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Knowledge of heat wave is a key to control the iron ore sintering process. To enhance the knowledge, numerical integration of differential equations for gas and solid is prevailing; this report, otherwise, used an analytical method and introduced several solutions by the assumption that the heat wave descended in steady state and that gas and solid temperatures coincided. The solutions correlated characters of heat wave with operational factors in a simple and explicit manner like:1) Heat behind speed (UB) was a function of gas velocity (ug) as UB=(cgug)/(csρs);2) Solid maximum temperature (TP) comprised an adiabatic temperature increase due to coke combustion (θc) and a heat convection due to downdraft necessary for solid temperature to heat up to coke ignition (θig) as TP=θc+θig;3) Heat front speed (UF) correlated with UB (=ν) and the terms for coke combustion heat generation (θc) and ignition temperature (θig) as UF=ν·(1+θc/θig).

Theoretical Characterization of Steady-state Heat Wave Propagating in Iron Ore Sintering Bed